Manual Library / Quad. 4 Input Pre Amplifier (1984-90). The Quad 34 provides the serious music listener with everything necessary for the full enjoyment of music from radio, disc, tape and compact disc and continues a process of evolution which began more than thirty years ago with the original Quad control unit. Quad Lock® is the strongest and most secure mounting system in the world that integrates your smartphone into an active lifestyle. The unique approach of integrating the mounting interface into a slim and durable everyday case allows the Quad Lock® mounts to be much smaller than any other mount on the market.
Hi
Ive been given a 303 for repair as its been sitting on the shelf for abt 2 yrs, its a 80k+ serial number (i think that means its an 80s model but not sure), so about 30yrs old give or take but this has had a hard life seeing over 12h a day action over most of its life.
It was in use connected to a set of Rogers in a freinds home studio till one day it let the magic smoke out. Freind looked and saw a resistor on the power board which burnt completley (it is the one directly below the and closest to the heatsink), my wiring diagram reading skills are not briliant so cant work out which one it is. It is one between pins 12+13 and also one leg of a transistor. I think its R204.
So from that point it was just left standing before comming to me after 2 yrs.
Ive looked, it needs new PSU and Speaker caps as they are all buldged on the top and also some have started to leak.
So is this all fixable and could it have taken out anything else? All other boards look ok.
I was thinking getting the Net Audio, full replacement kit of caps, psu board, rectifier bridge and sound board caps plus replace all the open frame bias parts with newer versions.
We are also looking to stop using the Quad 33 Pre so i was thinking of either replacing the front plate or just adding additional RCA connections to the existing plate along with a pot to adjust line in, this would then allow us to plug the unit directly into the soundcard output.
Any help would be much apreacitated to restore this unit back to working.
Ive been given a 303 for repair as its been sitting on the shelf for abt 2 yrs, its a 80k+ serial number (i think that means its an 80s model but not sure), so about 30yrs old give or take but this has had a hard life seeing over 12h a day action over most of its life.
It was in use connected to a set of Rogers in a freinds home studio till one day it let the magic smoke out. Freind looked and saw a resistor on the power board which burnt completley (it is the one directly below the and closest to the heatsink), my wiring diagram reading skills are not briliant so cant work out which one it is. It is one between pins 12+13 and also one leg of a transistor. I think its R204.
So from that point it was just left standing before comming to me after 2 yrs.
Ive looked, it needs new PSU and Speaker caps as they are all buldged on the top and also some have started to leak.
So is this all fixable and could it have taken out anything else? All other boards look ok.
I was thinking getting the Net Audio, full replacement kit of caps, psu board, rectifier bridge and sound board caps plus replace all the open frame bias parts with newer versions.
We are also looking to stop using the Quad 33 Pre so i was thinking of either replacing the front plate or just adding additional RCA connections to the existing plate along with a pot to adjust line in, this would then allow us to plug the unit directly into the soundcard output.
Any help would be much apreacitated to restore this unit back to working.
![Quad Quad](http://servicerepairmanuals.net/wp-content/uploads/2015/04/Quad-303-Service-Manual-2.png)
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